JP7119216B2 - Rectification structure of saddle type vehicle - Google Patents

Description

The present invention relates to a straightening structure for a saddle type vehicle.

Many protrusions are present on the outer surface of the body of a straddle-type vehicle such as a motorcycle. For example, Patent Literature 1 discloses a structure in which a stay for mounting a front basket extends from the front surface of a leg shield of a motorcycle.

JP 2013-112258 A

By the way, when a projection is provided on the outer surface of the vehicle body of a saddle-riding type vehicle, it is desirable to sufficiently consider countermeasures against running wind. As a countermeasure against running wind, in addition to reducing air resistance, it is conceivable to improve passenger comfort.
However, in the above-described conventional structure, there is no mention of countermeasures against running wind, and the above-mentioned problem remains.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a straightening structure for a saddle-riding type vehicle that can reduce running resistance and improve the comfort of passengers by straightening the running wind using projections provided on the outer surface of the vehicle body.

As a means for solving the above problems, a first aspect of the present invention includes a front cowl (FC) arranged in front of a passenger space (K2), and an outer surface (m1) of the front cowl (FC) is provided with the outer surface It has projections (71) for creating defined turbulence in the running wind flowing along (m1).

According to a second aspect of the present invention, in the first aspect, the projection (71) is arranged on the front surface (m1) of the front cowl (FC) facing forward of the vehicle, and It is arranged within a predetermined width from the part (e1) to the inner peripheral side.

According to a third aspect of the present invention, in the second aspect, the protrusion (71) is arranged at a predetermined distance from the peripheral edge (e1).

In a fourth aspect of the present invention, in the third or fourth aspect, the projection (71) extends over a pair of end portions (71a, 71b) and the longitudinal direction of the projection intersects the peripheral edge portion (e1). are arranged as

According to a fifth aspect of the present invention, in any one of the second to fourth aspects, the projection (71) has a length in the longitudinal direction extending over the pair of ends (71a, 71b). It is longer than the distance from the peripheral edge (e1) to the projection (71).

According to a sixth aspect of the present invention, in any one of the second to fifth aspects, a plurality of the projections (71) are arranged along the peripheral edge (e1).

In a seventh aspect of the present invention, in any one of the first to sixth aspects, the protrusion (71) extends along the longitudinal direction of the protrusion (71a, 71b) and extends along the axis (C1 ) is formed symmetrically with respect to

According to an eighth aspect of the present invention, in any one of the first to seventh aspects, the protrusion (71) has a chevron shape having a protruding top (Zt) in a side view orthogonal to the longitudinal direction of the protrusion. None, the protrusion (71) has a front inclined portion that rises from the protrusion front end (71a) toward the protrusion top (Zt) on the front side in the vehicle front-rear direction, and the protrusion (71) is located on the vehicle front-rear direction rear side. has a rear inclined portion which is lowered from the projecting top portion (Zt) toward the projecting rear end portion (71b).

According to a ninth aspect of the present invention, in the eighth aspect, the front inclined portion is longer than the rear inclined portion in the longitudinal direction of the projection.

According to a tenth aspect of the present invention, in the eighth aspect, the rear sloped portion is longer than the front sloped portion in the longitudinal direction of the projection.

According to an eleventh aspect of the present invention, in any one of the first to tenth aspects, the front cowl (FC) is positioned in front of the leg placement spaces (K3) on both sides of the lower portion of the passenger space (K2). The projection (71) is arranged on the front surface (m1) of the leg shield (LS) facing forward of the vehicle.

According to a twelfth aspect of the present invention, in the eleventh aspect, a seat (28) on which an occupant sits is provided behind the leg shield (LS), and the upper end of the leg shield (LS) is It extends above the seating surface (28a) of the seat (28).

According to a thirteenth aspect of the present invention, in the eleventh or twelfth aspect, the projection (71) is arranged such that the longitudinal direction of the projection extending over the pair of end portions (71a, 71b) faces the vehicle front-rear direction. and a steering handle (12) is arranged on the extension of the projection longitudinal direction when viewed from the front of the vehicle.

According to a fourteenth aspect of the present invention, in any one of the first to thirteenth aspects, the front cowl (FC) has a screen (SC) extending above the steering handle (12). The projection (71) is arranged on the front surface (m1) of the screen (SC) facing forward of the vehicle.

According to a fifteenth aspect of the present invention, in any one of the first to fourteenth aspects, a mounting structure (ms) for detachably mounting the projection (71) to the front cowl (FC) is provided. ing.

According to the first aspect of the present invention, since the outer surface of the front cowl is provided with the projections that generate turbulence in the traveling wind flowing along the outer surface, the prescribed turbulent flow generated behind the projections causes the front cowl to erode. To obtain the effect of delaying the separation of running wind from the outer surface. Therefore, it is possible to suppress the air resistance due to separation of the running wind immediately after the front cowl. In addition, it is possible to suppress the entrainment of running wind toward the passenger space behind the front cowl, thereby improving the comfort of the occupant.

According to the second aspect of the present invention, since the protrusion is arranged within a predetermined range from the peripheral edge of the front face of the front cowl, the specified turbulent flow tends to reach behind the peripheral edge of the front cowl, and the peripheral edge of the front cowl is easily generated. can enhance the effect of delaying the separation of running wind.

According to the third aspect of the present invention, since the protrusion is arranged apart from the peripheral edge of the front cowl, high-speed wind is generated on the front surface of the front cowl on the downstream side of the protrusion and reaches the peripheral edge. becomes possible. Therefore, it is possible to enhance the effect of delaying separation of the running wind at the peripheral edge portion of the front cowl.

According to the fourth aspect of the present invention, the longitudinal direction of the projection intersects the peripheral edge of the front cowl, so that air resistance can be suppressed when the vehicle receives running wind that intersects the peripheral edge of the front cowl. can be done. In addition, compared with the case where the longitudinal direction of the protrusion is arranged along the periphery of the front cowl, it is possible to better control the airflow using the length of the protrusion.

According to the fifth aspect of the present invention, since the projection is arranged away from the peripheral edge of the front cowl by a distance shorter than its own length, high-speed wind is generated on the front surface of the front cowl on the downstream side of the projection. It is possible to suppress disappearance of the high-velocity wind due to the protrusion being too far from the peripheral portion while obtaining the effect of increasing the flow rate.

According to the sixth aspect of the present invention, since a plurality of protrusions that generate turbulent flow in the running wind are arranged along the front cowl, turbulent flow is generated over a wide range of the peripheral edge to suppress entrainment of the running wind. Crew comfort can be improved.

According to the seventh aspect of the present invention, since the protrusions are formed symmetrically with respect to the axis along the longitudinal direction of the protrusions, it is possible to rectify the running wind straight along the longitudinal direction of the protrusions and enhance the rectification effect.

According to the eighth aspect of the present invention, the projection is formed in a chevron shape when viewed from the side, and has a front inclined portion that gradually becomes higher at the front portion of the projection, and a rear inclined portion that gradually becomes lower at the rear portion of the projection. , the air resistance of the protrusion can be further reduced, and the pressure change of the running wind can be moderated.

According to the ninth aspect of the present invention, since the front inclined portion has a gentler slope than the rear inclined portion, the air resistance at the front portion of the protrusion is further reduced, and the rear inclined portion is made steeper. The effect of generating turbulence can be enhanced.

According to the tenth aspect of the present invention, the rear sloping portion forms a gentler slope than the front sloping portion, thereby further reducing the air resistance at the rear portion of the projection and increasing the flow velocity of the running wind at the rear portion of the projection. can further improve the disturbing effect.

According to the eleventh aspect of the present invention, since the front surface of the leg shield is provided with a projection that causes turbulence in the running wind flowing along the front surface, the leg shield is regulated by the prescribed turbulence generated behind the projection. obtain the effect of delaying the separation of running wind from the front surface of the Therefore, it is possible to suppress the air resistance due to separation of the running wind immediately after the leg shield. In addition, it is possible to suppress the entrainment of running wind toward the leg placement space behind the leg shield, thereby improving the comfort of the occupant.

According to the twelfth aspect of the present invention, since the upper end of the leg shield extends above the seating surface of the seat, the leg shield overlaps the occupant's knees and thighs when viewed from the front of the vehicle. It is possible to suppress the wind blowing around the legs of the occupant. In addition, even if the leg shield does not completely cover the leg area, airflow control by the protrusions can reduce wind blowing around the leg area.

According to the thirteenth aspect of the present invention, since the steering handle is arranged on the extension of the projection in the longitudinal direction, traveling wind rectified by the projection of the leg shield is blocked by the steering handle and is less likely to hit the occupant, Crew comfort can be improved.

According to the fourteenth aspect of the present invention, since the front surface of the screen is provided with projections that generate turbulence in the traveling wind flowing along the front surface, the prescribed turbulence generated behind the projections causes the front surface of the screen to Obtain the effect of delaying the separation of running wind from. Therefore, it is possible to suppress the air resistance due to separation of the running wind immediately after the screen. In addition, it is possible to suppress the entrainment of running wind toward the leg arrangement space behind the screen, thereby improving the comfort of the occupant.

According to the fifteenth aspect of the present invention, since the projection is detachably attached to the front cowl, it is possible to cope with the case where the rider wants to be exposed to the running wind in the summer, for example, and the comfort of the occupant can be improved.

1 is a left side view of a motorcycle according to an embodiment of the present invention; FIG. It is a front view of the said motorcycle. FIG. 2 is a top view around a front cowl of the motorcycle; FIG. 4 is an explanatory diagram of a projection for generating turbulent flow provided on the front cowl; It is explanatory drawing of the 1st modification of the said protrusion. It is explanatory drawing of the 2nd modification of the said protrusion. It is explanatory drawing of the 3rd modification of the said protrusion. (a) is a side view showing the operation of the front cowl without the projection, and (b) is a side view showing the operation of the front cowl provided with the projection. (a) is a top view showing the operation of the front cowl without the projection, and (b) is a top view showing the operation of the front cowl provided with the projection. It is a left side view of the motorcycle in the second embodiment of the present invention. It is a front view of a motorcycle in a second embodiment. FIG. 4 is a top view around a front cowl of a motorcycle in a second embodiment; (a) is a side view showing the action of the front cowl without the projection in the second embodiment, and (b) is a side view showing the action of the front cowl provided with the projection in the second embodiment. It is a left side view of the motorcycle in the third embodiment of the present invention. It is a front view of a motorcycle in a third embodiment. FIG. 11 is a top view around a front cowl of a motorcycle according to a third embodiment; (a) is a side view showing the operation of the front cowl without the projection in the third embodiment, and (b) is a side view showing the operation of the front cowl provided with the projection in the third embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that directions such as front, rear, left, and right in the following description are the same as directions in the vehicle described below unless otherwise specified. An arrow FR indicating the front of the vehicle, an arrow LH indicating the left of the vehicle, an arrow UP indicating the upper side of the vehicle, and a line CL indicating the left-right center of the vehicle body are shown at appropriate locations in the drawings used in the following description.

<Whole vehicle>
As shown in FIG. 1, the motorcycle (saddle-type vehicle) 1 of the present embodiment is provided with a so-called underbone-type vehicle body frame F, thereby improving ease of straddling the vehicle body and lowering the center of gravity of the vehicle. It is a business-type motorcycle that aims to

The vehicle body frame F includes a head pipe 13 positioned at the front end, a main frame 14 extending downward and rearward from the head pipe 13 , and a pivot frame 15 extending downward from the rear end of the main frame 14 . The head pipe 13 supports a front wheel WF of the motorcycle 1, a pair of left and right front forks 11, and a steering handle 12 so as to be steerable. A front end of a swing arm 17 is supported by the pivot frame 15 so as to be vertically swingable. A rear wheel WR of the motorcycle 1 is supported at the rear end of the swing arm 17 . A front end portion of a seat frame 16 is connected to a rear portion of the main frame 14 . A pair of left and right rear cushions 9 are arranged between the seat frame 16 and the swing arm 17 .

2 and 3, the vehicle body of the motorcycle 1 is covered with a vehicle body cover 27. As shown in FIG. The vehicle body cover 27 includes a front body cover (front cowl) FC covering around the head pipe 13 and around the front part of the main frame 14, a rear body cover (rear cowl) RC covering around the rear part of the main frame 14 and around the seat frame 16, It has Left and right leg shields LS are formed on the left and right side portions of the front body cover FC so as to protrude outward in the left and right directions. A seat 28 for seating an occupant is supported above the rear body cover RC. Above the main frame 14 and between the seat 28 and the steering handle 12 is a straddle space K1 that allows the occupant to easily straddle the vehicle body. The steering handle 12 is covered with a handle cover HC except for left and right grip portions. A headlamp HL is arranged on the front side of the left and right center of the handle cover HC, and a pair of left and right winker lamps WL are arranged on the front side of the left and right sides of the handle cover HC.

An engine E, which is the prime mover of the motorcycle 1, is supported below the main frame 14 . On both left and right sides of the engine E, steps 18 are arranged on which the passenger puts his or her feet.
The engine E is a four-stroke single-cylinder engine in which the rotation center axis of a crankshaft (not shown) is aligned in the left-right direction (vehicle width direction). (In detail, it is inclined slightly forward).

Above a cylinder portion 22 of the engine E, a throttle body (or carburetor) 24 and an air cleaner 25 are connected as intake system parts.
An exhaust pipe 41 is connected to the lower portion of the cylinder portion 22 (exhaust port of the cylinder head). The exhaust pipe 41 curves rearward under the cylinder portion 22 and is connected to a muffler (muffler) 42 arranged on the right side of the rear wheel WR.

The front body cover FC includes a front center cover FC1 that covers the periphery of the head pipe 13 from the front, and an inner cover FC2 that covers the periphery of the head pipe 13 from the rear and the periphery of the main frame 14 from above. A pair of left and right leg shields LS are integrally formed on both left and right sides of the inner cover FC2.

The leg shields LS are arranged in front of the leg placement spaces K3 on both sides of the lower portion of the passenger space K2, and cover the legs of the passenger (driver) from the front. The leg shield LS has an upper end portion that extends above an upper surface (seating surface) 28 a of the seat 28 . The upper end of the leg shield LS is arranged forwardly and downwardly of the steering handle 12 with a space therebetween. The leg shield LS extends below the step 18 at its lower end.

The leg shield LS has an upper portion LS1 arranged side by side on both left and right sides of the front center cover FC1, and a lower portion LS2 extending below the upper portion LS1. The upper part LS1 is inclined so as to be positioned more rearward as it goes upward in a side view, and the lower part LS2 is inclined so as to be positioned more rearward as it is downward when viewed from a side. The upper part LS1 and the lower part LS2 are connected to form a forwardly convex arc shape in a side view. The left and right inside portions of the lower portion LS2 are displaced left and right outside relative to the left and right inside portions of the upper portion LS1 so as to form tire housings for the front wheels WF.

The upper portion LS1 and the lower portion LS2 are inclined so as to be located rearward toward the left and right outer sides in a plan view. In the leg shield LS consisting of the upper portion LS1 and the lower portion LS2, the front surface m1 facing the front of the vehicle has a spherical shape (curved shape) convex forward and left and right outward.

The upper LS1 has an upper edge portion e1a that is inclined downward toward the left and right outer sides in a front view, and an upper side edge portion e1b that is inclined toward the left and right outer sides toward the lower side in a front view. there is The lower LS2 includes a lower side edge portion e1c that is slightly inclined so as to be positioned inward and leftward as viewed from the front, and a lower edge portion e1d that is inclined so as to be positioned downward and inward as viewed from the front. have. The upper edge e1a, the upper side edge e1b, the lower side edge e1c, and the lower edge e1d form a smoothly continuous peripheral edge e1 without forming corners or recesses in the leg shield LS. The upper side edge portion e1b and the lower side edge portion e1c may be collectively referred to as the side edge portion e1e.

The front face m1 of the leg shield LS is inclined (curved) so as to be positioned further rearward as it is positioned closer to the peripheral edge portion e1 (peripheral side). In other words, the front face m1 of the leg shield LS is slanted (curved) so as to be positioned further forward as it is positioned closer to the inner peripheral side than the peripheral edge portion e1.

The leg shield LS of this embodiment has a single plate structure integrally formed on both sides of the inner cover FC2. It may be a leg shield LS consisting of elements.

<Cowl protrusion structure>
As shown in FIGS. 1 to 3, a peripheral edge portion e1 of the leg shield LS is provided with a projection 71 for disturbing the running wind to generate a small turbulent flow. The projection 71 protrudes forward from the front surface m1 on the outer surface (front surface m1) of the leg shield LS. The protrusion 71 functions as a vortex generator for generating a specified turbulence (vortex) in the running wind flowing along the curved front surface m1 of the leg shield LS. That is, by intentionally causing a small turbulent flow with the protrusion 71, the airflow behind the peripheral edge portion e1 of the leg shield LS is controlled, and effects such as reducing the air resistance of the leg shield LS are obtained.

In this embodiment, a small protrusion is provided on the front face m1 of the leg shield LS to generate a stable small vortex (turbulence) on the principle of a turbulence blade (vortex generator). This suppresses the generation of large and unstable vortices, reduces the air resistance around the leg shield LS, and improves fuel efficiency. The projections 71 reduce wind noise by creating turbulence and improve stability around the leg shield LS. The protrusion 71 suppresses (delays) the separation of the traveling wind, thereby suppressing the effect of the traveling wind on the leg arrangement space behind the leg shield LS, and favorably maintaining the comfort of the passenger space K2.

The protrusion 71 is arranged within a prescribed width range along the front surface m1 from the peripheral edge portion e1 (outer peripheral edge portion) of the front surface m1 of the leg shield LS to the inner peripheral side. When viewed from the direction (perpendicular direction) perpendicular to the projection installation position (point) on the front surface m1, the projection 71 is arranged so that the extension line along its own longitudinal direction (projection longitudinal direction) intersects the peripheral edge portion e1. It is When viewed from the perpendicular direction, the straight line (axis C1) along the longitudinal direction of the protrusion is at an angle (for example, in the range of 0° to 45°) that is parallel to the tangent line of the peripheral edge e1 at the intersection with the peripheral edge e1. Instead, they are arranged at an angle closer to the orthogonal (for example, in the range of 45° to 90°).

The protrusion 71 is arranged at a specified distance along the front surface m1 from the peripheral edge portion e1 of the leg shield LS to the inner peripheral side. The prescribed distance is set to be less than the total length of the projection 71 in the projection longitudinal direction.
A plurality of protrusions 71 are arranged along the peripheral edge portion e1. Specifically, a plurality (two) of the protrusions 71 are arranged side by side along the upper edge e1a at the upper end of the leg shield LS. A plurality of protrusions 71 provided on the upper end of the leg shield LS are arranged at intervals along the upper edge e1a. When viewed from the front of the vehicle, the plurality of projections 71 provided on the upper end of the leg shield LS are arranged so that the steering handle 12 is positioned on the extension of the projection longitudinal direction.

Alternatively, the projection 71 may be arranged at the outer edge of the leg shield LS, as shown in FIG. 8(b). In the example of FIG. 8(b), a plurality (two) of protrusions 71 are arranged side by side along the side edges e1e at the upper and lower intermediate portions and the lower end portion of the leg shield LS.

FIG. 4(a) is a plan view of the protrusion 71 viewed from the perpendicular direction, and FIG. 4(b) is a side view of the protrusion 71 viewed from the protrusion width direction orthogonal to the perpendicular direction. The protrusion width direction corresponds to a direction along a tangential line at the protrusion installation position (point) of the front surface m1, among directions orthogonal to the perpendicular direction.
The projection 71 has an outer shape extending along the projection longitudinal direction (arrow Y direction). The protrusion 71 has an external shape that is line-symmetrical with respect to the central axis C1 along the longitudinal direction of the protrusion in a plan view of FIG. 4(a). The protrusion 71 has an outer shape that is line symmetrical with respect to the vertical line of the protrusion installation position on the front surface m1 when viewed from the direction of the axis C1.

The projection 71 has a dimension (total length) Y1 in the projection longitudinal direction, a dimension (total width) X1 in the projection width direction (arrow X direction) orthogonal to the projection longitudinal direction in plan view in FIG. It is larger than any of the dimension (total height) Z1 in the projection height direction (the arrow Z direction) along. The protrusion 71 has an inclination angle along the front surface m1 and is arranged with the longitudinal direction of the protrusion facing the vehicle front-rear direction. In the drawing, reference numeral 71a indicates the front end portion of the projection 71, and reference numeral 71b indicates the rear end portion of the projection 71. As shown in FIG.

In the present embodiment, "oriented in the vehicle front-rear direction" includes an arrangement that is inclined with respect to the vehicle front-rear direction by about the inclination angle of the projection installation position on the front surface m1 of the leg shield LS. The protrusion installation position corresponds to, for example, the center of gravity position of the joint surface shape of the protrusion 71 to the leg shield LS.

The protrusion 71 is formed so that the full width X1 in the protrusion width direction orthogonal to the protrusion longitudinal direction is narrower than the full length Y1 in the protrusion longitudinal direction. The projection 71 has a total height Z1 in the projection height direction perpendicular to the projection longitudinal direction, which is lower than the total length Y1 in the projection longitudinal direction. As a result, the air resistance of the protrusion 71 is suppressed when it receives the running wind from the front of the vehicle.

In a plan view of FIG. 4A, the protrusion 71 has a maximum width portion Xm in the width direction of the protrusion behind the central position Yc in the longitudinal direction of the protrusion. 4(a), the projection 71 has a pair of first side edges 72 which are forward of the maximum width portion Xm and which are inclined so as to be closer to the axis C1 toward the front side. 4A, the protrusion 71 has a pair of second side edges 75 that are inclined to the rear of the maximum width portion Xm so as to be positioned closer to the axis C1 as it moves rearward.

In the side view of FIG. 4B, the projection 71 has a maximum height Zm in the projection height direction behind the central position Yc in the projection longitudinal direction. The maximum height portion Zm is, for example, at the same position in the front-rear direction as the maximum width portion Xm, but they may be offset in the front-rear direction. Symbol Zt in the drawing indicates the upper end of the maximum height portion Zm (hereinafter referred to as the projecting top portion Zt). The protrusion 71 has a mountain shape having a protruding top Zt when viewed from the side perpendicular to the longitudinal direction of the protrusion (when viewed from the width direction of the protrusion).

In the side view of FIG. 4(b), the projection 71 has a first inclined portion 81 which is located forward of the projecting top Zt and downward toward the front side.
In the side view of FIG. 4(b), the projection 71 has a second inclined portion 84 that is inclined so as to be located downward toward the rear side of the projecting top portion Zt.

When viewed in the direction of the axis C1, the projection 71 has a substantially triangular shape (mountain shape). As viewed in the direction of the axis C1, the protrusion 71 has a pair of side wall portions that are inclined so as to be located inward in the width direction toward the upper side.

In the side view of FIG. 4B, the projection 71 has a first inclined portion 81 as a forward-sloping front-side inclined portion forward of the projecting top Zt, and a rearward-sloping front-side inclined portion behind the projecting top Zt. It has a second inclined portion 84 as a rear inclined portion. The height of the projection 71 gradually increases in front of the projecting top Zt and gradually decreases behind the projecting top Zt. This reduces the air resistance when the projection 71 receives the running wind that flows along the outer surface of the cowl body 43 . In addition, the compression and expansion of the traveling air become gentle, and the generation of noise (wind noise) is suppressed.

The projection 71 is formed such that the first inclined portion 81 as the front inclined portion is longer than the second inclined portion 84 as the rear inclined portion in the longitudinal direction of the projection. That is, the length L1 of the first inclined portion 81 in the longitudinal direction of the projection is longer than the length L2 of the second inclined portion 84 in the longitudinal direction of the projection. As a result, the projection 71 is formed such that the front inclined portion has a gentler inclination than the rear inclined portion. Therefore, the air resistance in front of the protrusion 71 is reduced, and turbulence is likely to occur in the rear of the protrusion 71 .

In the plan view of FIG. 4A, the width of the projection 71 gradually increases in front of the maximum width portion Xm and gradually decreases behind the maximum width portion Xm. This also reduces air resistance and suppresses the generation of noise (wind noise).

FIG. 5 shows a first modification in which the orientation of the projection 71 in the front-rear direction is reversed.
In the projection 171 of this modified example, the first inclined portion 81 as the rear inclined portion is longer than the second inclined portion 84 as the front inclined portion in the longitudinal direction of the projection. As a result, the projection 171 is formed such that the rear sloped portion has a gentler slope than the front sloped portion. As a result, the projection 171 becomes nearly streamlined, and the running wind that has passed over the projecting top Zt is prevented from separating at the rear of the projection 171, and the flow velocity of the running wind increases at the rear of the projection 171, improving the effect of disturbing the running wind. Let

FIG. 6 shows a second modification in which the projection 71 has a different shape. In the projection 271 of this modified example, the rear portion of the maximum width portion Xm and the maximum height portion Zm is removed from the example of FIG. 4 to form a rear end surface 275 perpendicular to the axis C1. As a result, turbulence is more likely to occur behind the protrusion 271 .

FIG. 7 shows a third modification in which the shape of the protrusion 71 is further changed. The protrusion 371 of this modified example forms a rear end surface 375 inclined so as to be located rearward as it goes upward, compared to the example of FIG. As a result, turbulence is more likely to occur at the rear portion of the projection 71 .
Unless otherwise specified, the term "protrusion 71" in this embodiment includes each of the modifications described above.

Here, the front body cover FC has a mounting device ms (see FIG. 4) for detachably mounting the projection 71 to the leg shield LS. The mounting structure ms includes, for example, a joining structure using magnets, hook-and-loop fasteners, etc., a fastening structure using bolts and nuts, an engaging structure using locking claws, and the like. Accordingly, it is possible to switch the presence or absence of the protrusions 71 and adjust the number and arrangement of the protrusions 71 according to the season, the occupant's preference, and the like.

<Action>
Next, the action of the protrusion 71 of this embodiment will be described with reference to FIGS. 8 and 9. FIG.
Referring to the comparative examples of FIGS. 8A and 9A, when the motorcycle 1 is running, if the running wind W1 flows around the leg shield LS, there is a negative impact behind the peripheral edge e1 of the leg shield LS. pressure is generated. The traveling wind W1 that flows along the curve of the front surface m1 of the leg shield LS is sucked into the negative pressure behind the leg shield LS, and flows into the passenger space K2 (inside the leg arrangement space K3) behind the leg shield LS. It flows like it's involved. This running wind W1 separates from the peripheral edge portion e1 of the leg shield LS, thereby generating air resistance around the leg shield LS. Also, part of the running wind W1 becomes an air current (entrainment wind W2) that is drawn into the passenger space K2 (inside the leg arrangement space K3) behind the leg shield LS, and this entrainment wind W2 enters the leg arrangement space K3 from above and from the outside. Inflate to affect the comfort of the occupant J around the legs J1.

As compared with the above comparative example, as shown in FIGS. 8(b) and 9(b), by providing the protrusion 71 near the peripheral edge e1 of the front face m1 of the leg shield LS, the following effects are obtained. That is, by providing the protrusion 71 in the flow of the running wind W1 along the front face m1 of the leg shield LS, a small turbulent flow (eddy current) W3 is generated in this running wind W1. By causing this turbulent flow W3 to flow in the vicinity of the peripheral edge e1 of the leg shield LS, the boundary layer of the traveling wind W1 is turbulent in the vicinity of the peripheral edge e1 of the leg shield LS, and the airflow is separated at the peripheral edge e1 of the leg shield LS. delay. This suppresses the generation of a large vortex immediately after the running wind W1 passes the peripheral edge portion e1 of the leg shield LS, and suppresses the generation of an air current (drawing wind) that is drawn into the passenger space K2. Therefore, it is possible to reduce the air resistance of the leg shield LS and suppress the influence on the passenger space K2.

As described above, the straightening structure for a straddle-type vehicle in the above-described embodiment includes the front body cover FC arranged in front of the passenger space K2. It is equipped with a protrusion 71 for creating a defined turbulence in the running wind that flows through it.
Specifically, the front body cover FC includes leg shields LS that are arranged in front of the leg placement spaces K3 on both sides of the lower part of the passenger space K2, and the projections 71 are formed on the front face m1 of the leg shields LS that faces the front of the vehicle. are placed.
According to this configuration, the outer surface of the front body cover FC (the front surface m1 of the leg shield LS) is provided with the protrusion 71 that causes turbulence in the running wind flowing along the outer surface (the front surface m1). The generated regular turbulent flow has the effect of delaying separation of the running wind from the outer surface of the front body cover FC (the front surface m1 of the leg shield LS). Therefore, it is possible to suppress the air resistance due to separation of the running wind immediately after the front body cover FC (immediately after the leg shield LS). In addition, it is possible to suppress the entrainment of running wind toward the passenger space K2 behind the front body cover FC (the leg arrangement space K3 behind the leg shield LS), thereby improving the comfort of the occupant.
It should be noted that the portion where the protrusion 71 is arranged is not limited to the leg shield LS. For example, the protrusion 71 may be arranged on the handle cover HC or on the wind screen that rises above the steering handle 12 if the wind screen is provided. The projection 71 may be arranged not only on the front surface of the front cowl, but also on other outer surfaces such as the side surface and the lower surface. When the front cowl has a multi-layer structure, it may be arranged on the outer surface of any layer.

In the straightening structure for a saddle type vehicle, a seat 28 on which an occupant sits is provided behind the leg shield LS.
According to this configuration, since the upper end of the leg shield LS is extended above the seating surface 28a of the seat 28, the leg shield LS overlaps the occupant's knees and thighs when viewed from the front of the vehicle. You can suppress the wind around your legs. In addition, even if the leg shield LS does not completely cover the leg area, airflow control by the protrusion 71 can suppress wind blowing around the leg area.

In the straightening structure for a saddle type vehicle, the projection 71 is arranged such that the longitudinal direction of the projection extending across the pair of end portions 71a and 71b faces the longitudinal direction of the vehicle, and the longitudinal direction of the projection extends along the longitudinal direction of the vehicle when viewed from the front of the vehicle. A steering handle 12 is arranged.
According to this configuration, since the steering handle 12 is arranged on the extension of the projection in the longitudinal direction, the running wind rectified by the projection 71 of the leg shield LS is blocked by the steering handle 12 and is less likely to hit the occupant. Comfort can be improved.

The rectifying structure for the saddle type vehicle includes a mounting structure ms for detachably mounting the projection 71 to the leg shield LS.
According to this configuration, since the projection 71 is detachably attached to the leg shield LS, it is possible to cope with the case where the passenger wants to be exposed to the running wind in the summer, for example, and the comfort of the passenger can be improved.
That is, there are cases where it is desired to guide the running wind to the passenger space K2 even a little in the summer, etc., so by making the rectifying projection 71 detachable, it is possible to control the airflow in accordance with the season, passenger's preference, and the like. can. Further, by providing a plurality of parts of the mounting structure ms on the vehicle body side, the degree of freedom in installing the projections 71 is increased, and the airflow can be easily controlled.

In the straightening structure for a saddle type vehicle, the projection 71 is arranged within a predetermined width from the peripheral edge portion e1 of the front surface m1 to the inner peripheral side.
According to this configuration, since the projection 71 is arranged within a predetermined range from the peripheral edge e1 of the front face m1 of the leg shield LS, the specified turbulent flow tends to reach behind the peripheral edge e1 of the leg shield LS. The peripheral edge portion e1 can enhance the effect of delaying separation of the running wind.

In the straightening structure for a saddle type vehicle, the projection 71 is arranged at a predetermined distance from the peripheral edge portion e1.
According to this configuration, since the projection 71 is arranged away from the peripheral edge e1 of the leg shield LS, a high-velocity wind is generated on the front face m1 of the leg shield LS on the downstream side of the projection 71 and reaches the peripheral edge e1. It becomes possible to tighten. Therefore, it is possible to enhance the effect of delaying separation of running wind at the peripheral edge portion e1 of the leg shield LS.

In the straightening structure for a saddle-riding type vehicle, the length of the projection 71 in the projection longitudinal direction is longer than the distance from the peripheral edge portion e1 to the projection 71 .
According to this configuration, since the projection 71 is arranged away from the peripheral edge portion e1 of the leg shield LS by a distance shorter than its own length, high-velocity wind is blown onto the front face m1 of the leg shield LS on the downstream side of the projection 71. It is possible to suppress disappearance of the high-velocity wind due to the projection 71 being too far from the peripheral edge portion e1 while obtaining the effect of generating the wind.

In the straightening structure for a saddle type vehicle, the protrusion 71 is arranged such that the longitudinal direction of the protrusion intersects the peripheral edge portion e1.
According to this configuration, since the longitudinal direction of the projection faces the vehicle front-rear direction, it is possible to suppress the air resistance of the projection 71 when it receives the running wind from the front of the vehicle. In addition, the length of the protrusion 71 can be used to moderate the pressure change of the running wind, and the occurrence of wind noise due to the protrusion 71 can be suppressed. In addition, since the longitudinal direction of the protrusion intersects the peripheral edge e1 of the leg shield LS, the length of the protrusion 71 is utilized compared to the arrangement in which the longitudinal direction of the protrusion extends along the peripheral edge e1 of the leg shield LS. The airflow can be well controlled.

In the straightening structure for a saddle type vehicle, a plurality of protrusions 71 are arranged along the peripheral edge portion e1.
According to this configuration, since a plurality of protrusions 71 that generate turbulence in the running wind are arranged along the peripheral edge e1 of the leg shield LS, turbulent flow is generated over a wide range of the peripheral edge e1 to prevent the running wind from being involved. can be reduced and the comfort of the occupant can be improved.

In the straightening structure for a saddle type vehicle, the protrusion 71 is formed symmetrically with respect to the axis C1 along the longitudinal direction of the protrusion.
According to this configuration, since the protrusions 71 are formed symmetrically with respect to the axis C1 along the longitudinal direction of the protrusions, the running wind can be rectified straight along the longitudinal direction of the protrusions, and the rectification effect can be enhanced.

In the straightening structure for a saddle-riding type vehicle, the projection 71 has a mountain shape having a projecting top Zt when viewed from the side perpendicular to the longitudinal direction of the projection. It has a front inclined portion that rises toward the projecting top Zt, and a rear inclined portion that becomes lower from the projecting top Zt toward the projection rear end portion 71b on the rear side of the projection 71 in the vehicle front-rear direction. there is
According to this configuration, the projection 71 is formed in a chevron shape when viewed from the side, and has a front inclined portion that gradually rises at the front portion of the projection 71, and has a rear inclined portion that gradually becomes lower at the rear portion of the projection 71. Therefore, the air resistance of the projection 71 can be further reduced, and the pressure change of the running wind can be moderated.

In the straightening structure for a saddle type vehicle, if the front sloped portion is longer than the rear sloped portion in the longitudinal direction of the protrusion, the front sloped portion forms a gentler slope than the rear sloped portion. It is possible to further reduce the air resistance in the front part and increase the effect of generating turbulence by steepening the slope of the rear side slope part.

In the straightening structure for a saddle type vehicle, if the rear sloped portion is longer than the front sloped portion in the longitudinal direction of the projection, the rear sloped portion forms a gentler slope than the front sloped portion. The air resistance at the rear part can be further reduced, and the flow velocity of the running wind can be increased at the rear part of the protrusion 71 to further improve the effect of disturbing the running wind.

<Second embodiment>
Next, a second embodiment of the present invention will be described with reference to the drawings.
This embodiment is particularly different from the first embodiment in that it is applied to a scooter type vehicle having a step floor and a swing unit instead of a business type motorcycle in which the engine is supported on the vehicle body. The same reference numerals are assigned to other configurations that are the same as those of the above-described embodiment, and detailed description thereof will be omitted.

As shown in FIG. 10, the motorcycle (saddle type vehicle) 101 of this embodiment has a head pipe 13 at the front end of the body frame F. As shown in FIG. A front fork 11 that pivotally supports the front wheel WF and a steering handle 12 are steerably supported on the head pipe 13 . A lower front portion of a swing-type power unit (hereinafter referred to as a power unit U) is supported on the lower portion of the vehicle body frame F so as to be capable of swinging up and down. The motorcycle 101 is a unit-swing saddle type vehicle. The motorcycle 101 includes a power unit (swing unit) U in which an engine (internal combustion engine) E as a prime mover and a rear wheel WR as a drive wheel integrally swing with respect to a body frame F (body body). there is

The power unit U integrally includes an engine E at the front and a transmission case housing a transmission M at the left rear.
The power unit U is an integrated unit in which the engine E, which is the prime mover of the motorcycle 101, is arranged in the front part, and the transmission M for changing the output of the engine E is arranged in the rear left part. A rear portion of the transmission M supports an axle of a rear wheel WR, which is a driving wheel. A lower front portion of the power unit U is supported by, for example, a lower support portion of the vehicle body frame F via a suspension link or the like so as to be vertically swingable. A rear end portion of the power unit U is supported by a rear end portion of the vehicle body frame F via a rear cushion 9 which is a shock absorber.

The vehicle body frame F includes a down frame 14a extending downward and rearward from the head pipe 13, a lower frame 15a extending rearward from the lower end of the down frame 14a, a rear frame 16a extending rearward and upward from the rear end of the lower frame 15a, It has

11 and 12, the vehicle body frame F is covered with a vehicle body cover 27. As shown in FIG. A seat 28 having front and rear seating surfaces for seating an occupant is supported above the rear portion of the vehicle body cover 27 . The vehicle body cover 27 includes a step floor 29 on which a driver who is seated on a seat 28 puts his/her feet, a front body cover (front cowl) FC which extends in front of the step floor 29, and a rear body cover (rear cowl) RC which extends behind the step floor 29. and have. On both left and right sides of the front body cover FC, leg shields LS are formed to cover the front of the leg arrangement space K3 by the joining structure of the front and rear covers forming the front and rear surfaces of the front body cover FC. Note that the leg shield LS may have a single plate structure.

A seat 28 for seating an occupant is supported above the rear body cover RC. Above the step floor 29 and between the seat 28 and the steering handle 12 is a straddle space K1 that allows the occupant to easily straddle the vehicle body. The steering handle 12 is covered with a handle cover HC except for left and right grip portions. A headlamp HL is arranged on the front side of the left and right center of the handle cover HC, and a pair of left and right winker lamps WL are arranged on the front side of the left and right sides of the handle cover HC.

The step floor 29 is flat across the width of the low floor portion of the vehicle body, for example, and forms a substantially horizontal upper surface (floor surface, footrest surface 29a) of the low floor portion. It should be noted that a configuration in which a center tunnel extending in the front-rear direction may be provided in the center of the step floor 29 in the left-right direction.
The motorcycle 101 is a scooter type vehicle having a step floor 29 on which the rider puts his/her feet. An upper surface (footrest surface) 29a of the step floor 29 is inclined slightly upward in a side view.

<Cowl protrusion structure>
As shown in FIGS. 10 to 12, the motorcycle 101 has a projection 71 near the upper end of the front face m1 of the leg shield LS for generating turbulence in the running wind.
The protrusion 71 is arranged within a prescribed width range along the front surface m1 from the peripheral edge portion e1 (outer peripheral edge portion) of the front surface m1 of the leg shield LS to the inner peripheral side. When viewed from the direction (perpendicular direction) perpendicular to the projection installation position (point) on the front surface m1, the projection 71 is arranged so that the extension line along its own longitudinal direction (projection longitudinal direction) intersects the peripheral edge portion e1. It is When viewed from the perpendicular direction, the straight line along the longitudinal direction of the protrusion (the axis C1, see FIG. 4, etc.) forms an angle (for example, 0° to 45° range), but at an angle closer to the orthogonal (for example, 45° to 90° range).

The protrusion 71 is arranged at a specified distance along the front surface m1 from the peripheral edge portion e1 of the leg shield LS to the inner peripheral side. The prescribed distance is set to be less than the total length of the projection 71 in the projection longitudinal direction.
A plurality of protrusions 71 are arranged along the peripheral edge portion e1. Specifically, a plurality (two) of the protrusions 71 are arranged side by side along the upper edge e1a at the upper end of the leg shield LS. A plurality of protrusions 71 provided on the upper end of the leg shield LS are arranged at intervals along the upper edge e1a. When viewed from the front of the vehicle, the plurality of projections 71 provided on the upper end of the leg shield LS are arranged so that the steering handle 12 is positioned on the extension of the projection longitudinal direction.
The protrusion 71 has an inclination angle along the front surface m1 and is arranged with the longitudinal direction of the protrusion facing the vehicle front-rear direction.

The protrusion 71 has a maximum height portion Zm in the protrusion height direction behind the central position Yc in the protrusion longitudinal direction. The projection 71 has a first inclined portion 81 which is located forwardly of the projecting top portion Zt and inclined downward toward the front side. The projection 71 has a second inclined portion 84 that is inclined rearwardly of the projecting top portion Zt so as to be located downward toward the rear side. The protrusion 71 has a first inclined portion 81 as a forward-sloping front-side inclined portion forward of the protruding top portion Zt, and a second inclined portion as a rearward-sloping rear-side inclined portion behind the protruding top portion Zt. 84. The projection 71 is formed such that the first inclined portion 81 as the front inclined portion is longer than the second inclined portion 84 as the rear inclined portion in the longitudinal direction of the projection.
The front body cover FC has a mounting device (not shown) for detachably mounting the protrusion 71 to the leg shield LS.

<Action>
Next, the action of the protrusion 71 of this embodiment will be described with reference to FIG.
Referring to the comparative example of FIG. 13(a), when the motorcycle 101 is running, if the running wind W1 flows around the leg shield LS, the peripheral edge e1 (particularly the upper edge e1a) of the leg shield LS will be blown behind. Negative pressure is created. The traveling wind W1 that flows along the curve of the front surface m1 of the leg shield LS is sucked into the negative pressure behind the leg shield LS, and flows into the passenger space K2 (inside the leg arrangement space K3) behind the leg shield LS. It flows like it's involved. This running wind W1 separates from the peripheral edge portion e1 of the leg shield LS, thereby generating air resistance around the leg shield LS. Also, part of the running wind W1 becomes an air current (entrainment wind W2) that is drawn into the passenger space K2 (inside the leg arrangement space K3) behind the leg shield LS, and this entrainment wind W2 enters the leg arrangement space K3 from above and from the outside. Inflate to affect the comfort of the occupant J around the legs J1.

As compared with the above comparative example, as shown in FIG. 13(b), by providing the protrusion 71 in the vicinity of the upper edge e1a of the front surface m1 of the leg shield LS, the following effects are obtained. That is, by providing the protrusion 71 in the flow of the running wind W1 along the front face m1 of the leg shield LS, a small turbulent flow (eddy current) W3 is generated in this running wind W1. By causing this turbulent flow W3 to flow in the vicinity of the upper edge e1a of the leg shield LS, the boundary layer of the running wind W1 is turbulent in the vicinity of the upper edge e1a of the leg shield LS. Delays airflow separation. This suppresses the generation of a large vortex immediately after the running wind W1 passes the upper edge e1a of the leg shield LS, and suppresses the generation of an air current (drawing wind) that is drawn into the passenger space K2. Therefore, it is possible to reduce the air resistance of the leg shield LS and suppress the influence on the passenger space K2. The above effect can be enhanced by providing the protrusion 71 also near the side edge e1e of the leg shield LS.

As described above, in the straightening structure for a saddle type vehicle in the second embodiment as well, the outer surface of the front body cover FC (the front surface m1 of the leg shield LS) is disturbed by the running wind flowing along the outer surface (the front surface m1). Since the projections 71 that generate the flow are provided, the specified turbulent flow generated behind the projections 71 has the effect of delaying separation of the running wind from the outer surface of the front body cover FC (the front surface m1 of the leg shield LS). Therefore, it is possible to suppress the air resistance due to separation of the running wind immediately after the front body cover FC (immediately after the leg shield LS). In addition, it is possible to suppress the entrainment of running wind toward the passenger space K2 behind the front body cover FC (the leg arrangement space K3 behind the leg shield LS), thereby improving the comfort of the occupant.

<Third Embodiment>
Next, a third embodiment of the present invention will be described with reference to the drawings.
Unlike the second embodiment, this embodiment is applied to a scooter-type vehicle having a center tunnel extending in the longitudinal direction of the vehicle between the left and right step floors and having a windscreen rising above the steering handle. particularly different in The same reference numerals are assigned to other configurations that are the same as those of the above-described embodiment, and detailed description thereof will be omitted.

As shown in FIG. 14, the motorcycle (saddle type vehicle) 201 of this embodiment has a head pipe 13 at the front end of the body frame F. As shown in FIG. A front fork 11 that pivotally supports the front wheel WF and a steering handle 12 are steerably supported on the head pipe 13 . A lower front portion of a swing-type power unit (hereinafter referred to as a power unit U) is supported on the lower portion of the vehicle body frame F so as to be capable of swinging up and down. The motorcycle 101 is a unit-swing saddle type vehicle. The motorcycle 101 includes a power unit (swing unit) U in which an engine (internal combustion engine) E as a prime mover and a rear wheel WR as a drive wheel integrally swing with respect to a body frame F (body body). there is

The power unit U integrally includes an engine E at the front and a transmission case 35 housing the transmission M at the left rear.
The power unit U is an integral unit in which the engine E, which is the prime mover of the motorcycle 201, is arranged in the front part, and the transmission M for changing the output of the engine E is arranged in the rear left part. A rear portion of the transmission M supports an axle of a rear wheel WR, which is a driving wheel. A lower front portion of the power unit U is supported by, for example, a lower support portion of the vehicle body frame F via a suspension link or the like so as to be vertically swingable. A rear end portion of the power unit U is supported by a rear end portion of the vehicle body frame F via a rear cushion 9 which is a shock absorber.

The vehicle body frame F includes a down frame 14a extending downward and rearward from the head pipe 13, a lower frame 15a extending rearward from the lower end of the down frame 14a, a rear frame 16a extending rearward and upward from the rear end of the lower frame 15a, It has

15 and 16, the vehicle body frame F is covered with a vehicle body cover 27. As shown in FIG. A seat 28 having front and rear seating surfaces for seating an occupant is supported above the rear portion of the vehicle body cover 27 . The vehicle body cover 27 includes a pair of left and right step floors 29 on which the feet of a driver seated on a seat 28 are placed, a center tunnel CT formed between the left and right step floors 29 and extending in the front-rear direction, the left and right step floors 29 and the center tunnel. A front body cover (front cowl) FC continues in front of the CT, and a rear body cover (rear cowl) RC continues behind the left and right step floors 29 and the center tunnel CT. On both left and right sides of the front body cover FC, leg shields LS are formed to cover the front of the leg arrangement space K3 by the joining structure of the front and rear covers forming the front and rear surfaces of the front body cover FC. Note that the leg shield LS may have a single plate structure.

A seat 28 for seating an occupant is supported above the rear body cover RC. Above the step floor 29 and between the seat 28 and the steering handle 12 is a straddle space K1 that allows the occupant to easily straddle the vehicle body. A screen SC is provided on the front upper side of the front body cover FC so as to rise in front of the passenger space K2. The screen SC extends above the steering handle 12 .

The left and right step floors 29 form a substantially horizontal upper surface (floor surface, footrest surface 29a) of the low floor portion.
The motorcycle 101 is a scooter type vehicle having a step floor 29 on which the rider puts his/her feet. An upper surface (footrest surface) 29a of the step floor 29 is inclined slightly upward in a side view.

<Cowl protrusion structure>
As shown in FIGS. 14 to 16, the motorcycle 201 has a projection 71 near the upper end of the front surface m2 of the screen SC for generating turbulence in the running wind. In the screen SC, the front surface m2 facing forward of the vehicle is slanted rearward and upward in a side view, and has an arc shape (curved shape) that is convex forward in a plan view.

The protrusion 71 is arranged downward from the upper edge e2 on the front surface m2 of the screen SC within a prescribed width range along the front surface m2. When viewed from the direction (perpendicular direction) perpendicular to the projection installation position (point) on the front surface m2, the projection 71 has an extension line along its own longitudinal direction (projection longitudinal direction) so as to intersect the upper edge e2. are placed. When viewed from the perpendicular direction, the straight line (axis C1) along the longitudinal direction of the projection is tangent to the upper edge e2 at the point of intersection with the upper edge e2, and the angle is parallel (for example, in the range of 0° to 45°). ), but at an angle closer to the orthogonal (for example, in the range of 45° to 90°).

The protrusion 71 is arranged downward from the upper edge e2 of the screen SC with a prescribed distance along the front surface m2. The prescribed distance is set to be less than the total length of the projection 71 in the projection longitudinal direction.
A plurality of protrusions 71 are arranged along the upper edge e2. Specifically, a plurality (two) of the protrusions 71 are arranged side by side along the upper edge e1a at the upper end of the screen SC. A plurality of protrusions 71 provided on the upper end of the screen SC are arranged at intervals along the upper edge e1a. The plurality of protrusions 71 are arranged symmetrically.
The protrusion 71 has an inclination angle along the front surface m2, and is arranged with the longitudinal direction of the protrusion oriented in the vehicle front-rear direction.

The protrusion 71 has a maximum height portion Zm in the protrusion height direction behind the central position Yc in the protrusion longitudinal direction. The projection 71 has a first inclined portion 81 which is located forwardly of the projecting top portion Zt and inclined downward toward the front side. The projection 71 has a second inclined portion 84 that is inclined rearwardly of the projecting top portion Zt so as to be located downward toward the rear side. The protrusion 71 has a first inclined portion 81 as a forward-sloping front-side inclined portion forward of the protruding top portion Zt, and a second inclined portion as a rearward-sloping rear-side inclined portion behind the protruding top portion Zt. 84. The projection 71 is formed such that the first inclined portion 81 as the front inclined portion is longer than the second inclined portion 84 as the rear inclined portion in the longitudinal direction of the projection.
The front body cover FC has a mounting device (not shown) for detachably mounting the protrusion 71 to the screen SC.

<Action>
Next, the action of the protrusion 71 of this embodiment will be described with reference to FIG.
Referring to the comparative example of FIG. 17(a), when the motorcycle 201 is running, when the running wind W1 flows around the screen SC, a negative pressure is generated behind the peripheral edge portion (particularly the upper edge portion e2) of the screen SC. occur. The running wind W1 that has flowed along the curve of the front surface m1 of the screen SC is sucked into the negative pressure behind the screen SC and flows so as to be involved in the passenger space K2 behind the screen SC. The running wind W1 separates from the periphery of the screen SC, thereby generating air resistance around the screen SC. Further, part of the running wind W1 becomes an air current (entraining wind W2) that is drawn into the passenger space K2 behind the screen SC, and this entraining wind W2 blows into the passenger space K2 from above and outside, thereby improving the comfort of the occupant J. influence.

As compared with the comparative example described above, as shown in FIG. 17B, the following effects can be obtained by providing the protrusion 71 near the upper edge e2 of the front surface m1 of the screen SC. That is, by providing the protrusion 71 in the flow of the running wind W1 along the front surface m1 of the screen SC, a small turbulent flow (eddy current) W3 is generated in the running wind W1. By causing this turbulent flow W3 to flow in the vicinity of the upper edge e2 of the screen SC, the boundary layer of the running wind W1 is turbulent in the vicinity of the upper edge e2 of the screen SC, and the airflow is separated at the upper edge e2 of the screen SC. delay. This suppresses the generation of a large vortex immediately after the running wind W1 passes the upper edge e2 of the screen SC, and suppresses the generation of an air current (drawing wind) that is drawn into the passenger space K2. Therefore, it is possible to reduce the air resistance of the screen SC and suppress the influence on the passenger space K2. The above effect can be enhanced by providing the protrusions 71 also near the side edges of the screen SC.

As described above, in the straightening structure for a saddle-riding type vehicle in the third embodiment, the front body cover FC includes the screen SC extending above the steering handle 12, and the projection 71 acts as a vehicle air conditioner on the screen SC. It is arranged on the front face m2 facing forward.
In the third embodiment as well, the outer surface of the front body cover FC (the front surface m2 of the screen SC) is provided with the protrusions 71 that generate turbulence in the running wind flowing along the outer surface (the front surface m2). The generated turbulent flow has the effect of delaying separation of the running wind from the outer surface of the front body cover FC (the front surface m2 of the screen SC). Therefore, it is possible to suppress the air resistance due to separation of the running wind immediately after the front body cover FC (immediately after the screen SC). In addition, it is possible to suppress the entrainment of traveling wind toward the passenger space K2 behind the front body cover FC (the leg arrangement space K3 behind the screen SC), thereby improving the comfort of the occupant.

It should be noted that the present invention is not limited to the above embodiments, and for example, the number and arrangement of protrusions are not limited to those of the above embodiments. The protrusion is not limited to a detachable configuration, and may be fixed by adhesion or formed integrally with the arrangement site.
The saddle type vehicle includes all types of vehicles in which the driver straddles the vehicle body, not only motorcycles (including motorized bicycles and scooter type vehicles), but also three-wheeled vehicles (one front wheel and two rear wheels). , including vehicles with two front wheels and one rear wheel) or vehicles with four wheels.
The configuration in the above embodiment is an example of the present invention, and various modifications, such as replacing the constituent elements of the embodiment with known constituent elements, are possible without departing from the gist of the present invention.

1 Motorcycle (saddle type vehicle)
12 steering handle 28 seat 28a seating surface FC front body cover (front cowl)
LS leg shield m1 front (outer surface)
e1 Periphery SC Screen m2 Front (outer surface)
e2 Upper edge 71 Projection 71a Front end 71b Rear end ms Mounting structure C1 Axis line Zt Protruding top K2 Ride space K3 Leg placement space

Claims (15)

Equipped with a front cowl (FC) placed in front of the passenger space (K2),
The outer surface (m1) of the front cowl (FC) is provided with a projection (71) for generating a prescribed turbulence in the running wind flowing along the outer surface (m1),
The protrusion (71) forms a mountain shape having a protruding top (Zt) in a side view orthogonal to the longitudinal direction of the protrusion extending over the pair of ends (71a, 71b),
The projection (71) has a front inclined portion that rises from the projection front end (71a) toward the projection top (Zt) on the vehicle front-rear direction front side, and the projection (71) has a vehicle front-rear direction rear side. A straightening structure for a saddle-riding type vehicle, which has a rear inclined portion that becomes lower from the projecting top portion (Zt) toward the projecting rear end portion (71b). The protrusion (71) is disposed on the front surface (m1) of the front cowl (FC) facing forward of the vehicle, and is within a predetermined width from the peripheral edge (e1) of the front surface (m1) to the inner peripheral side. The straightening structure for a saddle-riding type vehicle according to claim 1, wherein The straightening structure for a straddle-type vehicle according to claim 2, wherein the protrusion (71) is arranged at a predetermined distance from the peripheral edge (e1). 4. The straddle-type vehicle according to claim 2 or 3, wherein the projection (71) is arranged such that the longitudinal direction of the projection extending across the pair of end portions (71a, 71b) intersects the peripheral edge portion (e1). rectifying structure. 2. The protrusion (71) has a longitudinal direction extending over the pair of end portions (71a, 71b) in a longitudinal direction of the vehicle longer than a distance from the peripheral edge portion (e1) to the protrusion (71). 5. The straightening structure for a straddle-type vehicle according to any one of items 4 to 4. The straightening structure for a straddle-type vehicle according to any one of claims 2 to 5, wherein a plurality of the projections (71) are arranged along the peripheral edge portion (e1). The saddle according to any one of claims 1 to 6, wherein the protrusion (71) is formed symmetrically with respect to an axis (C1) along the longitudinal direction of the protrusion extending across the pair of ends (71a, 71b). Rectification structure of riding type vehicle. (delete) The straightening structure for a straddle-type vehicle according to claim 1, wherein the front inclined portion is longer than the rear inclined portion in the longitudinal direction of the projection. The straightening structure for a straddle-type vehicle according to claim 1, wherein the rear inclined portion is longer than the front inclined portion in the longitudinal direction of the projection. The front cowl (FC) includes a leg shield (LS) arranged in front of the leg placement spaces (K3) on both sides of the lower part of the passenger space (K2),
11. The saddle type vehicle straightening system according to any one of claims 1 to 7, 9 and 10, wherein the projection (71) is arranged on a front surface (m1) of the leg shield (LS) facing forward of the vehicle. structure. The straightening structure for a straddle-type vehicle according to claim 11, wherein the upper end of the leg shield (LS) extends above the seating surface (28a) of the seat (28). The projection (71) is arranged such that the longitudinal direction of the projection extending over the pair of end portions (71a, 71b) faces the vehicle front-rear direction, and the steering handle (12) extends along the extension of the projection longitudinal direction when viewed from the front of the vehicle. 13. The straightening structure for a straddle-type vehicle according to claim 11 or 12, wherein is arranged. The front cowl (FC) has a screen (SC) extending above the steering handle (12),
The straightening structure for a straddle-type vehicle according to any one of claims 1 to 7 and 9 to 13, wherein the projection (71) is arranged on a front surface (m1) of the screen (SC) facing forward of the vehicle. . The straightening structure for a straddle-type vehicle according to any one of claims 1 to 7 and 9 to 14, further comprising a mounting structure (ms) for detachably mounting the projection (71) on the front cowl (FC). .

Images